IDC21814I

Explanation
The return code was returned with the named function
as a result of an exceptional condition.
In the message text: function
The name of the function.
dsname
The data set name.
return-code
The return code.

System action
Processing associated with the error return code
ends.

System programmer response
  If the error recurs and the program
is not in error, look at the messages in the job log for more information. Search SMF and LOGREC records for information associated
with the error. Verify that the data set can be allocated and opened
from the failing system. Verify the device is online and available.
Increase the job region size. Verify the results being returned by
system installation exits associated with the failing function. Search
problem reporting data bases for a fix for the problem. If no fix
exists, or the return-code indicates an internal error, contact the IBM® Support Center. Provide the
JCL, the SYSOUT output for the job, and all printed output and output
data sets related to the problem.
See the
following publications for more information: z/OS MVS Installation Exits
DFSMSdfp Installation Exits  in z/OS DFSMS Implementing System-Managed Storage
z/OS DFSMSdfp Diagnosis.

A list of the return and reason codes follow for each
function affected: Function
DASD CALCULATION SERVICE Code
Reason  Explanation
04
Information for this data set could not be calculated.
10
Internal Error.
14
Internal Error. 
18
Error encountered while accessing the volume table
of contents (VTOC).
1C
Internal Error.
20
Storage unavailable.
24
Error encountered while accessing the volume table
of contents (VTOC).
28
Error encountered while accessing device information.
2C
Internal Error.
30
Error encountered during dynamic allocation.
34
Error encountered during PDSE File and Attribute Management Services.

Source
DFSMSdfp